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| 1 | 冲绳海槽Jade热液场烟囱物稀土元素和锶、钕同位素地球化学特征显示文摘热液烟囱物是弧后扩张盆地现代海底热液活动成矿系统的重要产物.冲绳海槽中的伊是名(Izena)海洼Jade热液活动区烟囱物稀土元素特征表现为轻稀土元素相对富集,并具有铕的较强的正异常.87Sr/86Sr和143Nd/144Nd的平均值分别为0.708 928和0.512 292,介于冲绳海槽海水和海槽酸性浮岩中的值之间.这些特征表明,Jade热液活动区的热液硫化物矿床的成矿物质来源于下伏的酸性火山岩.矿床的成矿机制可描述为:下渗的海水被加热,它与酸性火山岩发生水-岩热化学交换反应时淋滤出大量的成矿物质形成以富含轻稀土元素为特征的热水溶液;当热液喷出并发生快速结晶沉淀时,形成了以具有轻稀土元素相对富集和铕的正异常为特征的铜-锌硫化物和重晶石-非晶质SiO2型矿石. | 刘焱光 孟宪伟 付云霞 | 2005 | 海洋学报2005，27，5： | 7 |
| 2 | REE and Sr-Nd isotope characteristics of hydrothermal chimney at Jade area in the Okinawa Trough显示文摘Hydrothermal chimney is a product of hydrothermal activity on the seabed. Chimney samples dredged from Jade hydrothermal area in Izena depression of the Okinawa Trough, are characterized by relatively enriched light rare earth elements (LREE) and strongly positive Eu anomalies. 87Sr/86Sr and 143Nd/144Nd of these samples are exactly between those of seawater and of acidic pumice, averaged at 0.708928 and 0.512292, respectively. These characteristics imply that the main source of hydrothermal sulfide at Jade area is possibly the undersurface acidic rocks. The mineralizing mechanism can be summarized as follows: Large amount of mineralized material would be leached out and LREEenriched hydrothermal solution would be subsequently produced as a result of thermo-chemical exchange reaction between acidic volcanic rocks and heated seawater that penetrated in advance from upper water mass. The spurting out from the seabed and quickly crystallizing in the seawater of hydrothermal solution are responsible for the formation of Cu-Zn sulfide and barite-amorphous SiO2 minerals that are characterized by enriched LREE and positively strong Eu anomalies. | LIUYanguang MENGXianwei FUYunxia | 2004 | Acta Oceanologica Sinica2004，23，2： | 6 |
| 3 | Terrestrial flux in sediments from the Okinawa Trough estimated using geochemical compositional data and its response to climate changes over the past 35000 a显示文摘Terrestrial supply to marginal seas is a function of interaction between land and ocean in response to climate changes.Terrestrial flux in sediments,therefore,is potential not only to reflect the paleoceanographic evolution of sedimentary basin,but also to reveal the paleoclimatic changes in source regions.Sediments from the Okinawa Trough were quantitatively partitioned into terrestrial,volcanic and biogenitic end members using constrained least-squares technique for geochemical compositional data.Combined with the density of bulk sediments and sedimentation rate,the terrestrial flux in sediments from the Okinawa Trough since the last 35 000 a was estimated.Based on surface seawater temperature(SST) and sea level changes over the past 35 000 a,the response of terrestrial flux to the climate changes was discussed.It is demonstrated that the terrestrial supply to the Okinawa Trough mainly derived from Chinese landmass via the Changjiang(Yangtze) River and controlled by sea level changes.During the post-glaciation,the terrestrial flux was the lowest in response to the highest sea level stand.During the last glacial maximum(LGM),the terrestrial flux was not so high as previously expected,indicating the arid climatic condition in source region was responsible for lowering the Changjiang River's runoff during that time.During the deglaciation,the terrestrial flux increased in response to a quick rising of the sea level,probably implicating occurrence of down-slope transport.The four events characterized by slight increase in terrestrial flux exactly correspond to the LGM,Heinrich events(H1,H2,H3),respectively. | MENG Xianwei LIU Yanguang DU Dewen SHI Xuefa | 2009 | Acta Oceanologica Sinica2009，28，1： | 5 |
| 4 | 现代大型底栖有孔虫壳体地球化学元素的原位微区分析显示文摘有孔虫壳体中的微量元素组成是探明现代海洋环境以及恢复古海洋环境的重要依据。有孔虫壳体中的元素测试方式包括全分析和单个体分析。本实验利用激光剥蚀电感耦合等离子体质谱仪联机(LA-ICP-MS)对现代大型底栖有孔虫Amphistegina lobifera,Heterostegina depressa,Laevipeneroplis malayensis,Archaias angulatus壳体的微量元素组成进行了原位微区测定,并同时对Amphistegina lobifera,Heterostegina depressa进行了溶液全分析和原位微区分析对照测试。实验结果表明,四个有孔虫种壳体中均以Mg、Na、Sr、Si、B、Fe元素含量较高,且这些元素在同种的不同个体之间差异较小。Li、Cr、Mn、Ba等元素含量在此四种有孔虫中均较少,且在不同个体之间呈现较为显著的差异。对照测试结果显示,原位微区法和溶液法测得的Mg、Sr、Li元素含量无显著差异。 | 宫巨嵩 史宇坤 | 2017 | 微体古生物学报2017，34，3： | 3 |
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